Results 291 to 300 of about 26,044 (311)
Some of the next articles are maybe not open access.
Refractive Index Saturation Effects in Saturated Absorption Experiments
Physical Review Letters, 1975Saturation effects, occurring when a laser beam tuned close to a resonance propagates through an absorbing gaseous medium, were observed by means of a second beam sent in a nearly opposite direction. In addition to the well-known signal of saturated absorption, a signal directly related to the variation of the refractive index of the medium was ...
B. Couillaud, A. Ducasse
openaire +1 more source
Supernarrow saturated absorption resonances
Physics Reports, 1985Abstract The paper reviews the state-of-the-art in production of supernarrow resonances in the optical band by the method of saturated absorption and their application in spectroscopy. The influence of collisions, transit and other effects on the resonance width is discussed.
openaire +1 more source
2014
Remarkable atomic population difference symmetry and coherence properties that are achieved without the custom laser-induced population inversion by the non-linear (Raman) saturated absorption spectroscopy are quantum mechanically explained and analytically modeled.
openaire +1 more source
Remarkable atomic population difference symmetry and coherence properties that are achieved without the custom laser-induced population inversion by the non-linear (Raman) saturated absorption spectroscopy are quantum mechanically explained and analytically modeled.
openaire +1 more source
Absorption Saturation and Two-Photon Absorption in Graphene
MRS Proceedings, 2014ABSTRACTWe have investigated the photon-energy dependence of nonlinear optical absorption in graphene in the near infrared (NIR) and visible range (1.13 – 3.1 eV). Two nonlinear processes, namely one-photon interband absorption saturation and two-photon absorption (2PA), have been unambiguously determined in high-quality, CVD-grown, multilayer graphene
Weiqiang Chen, Yu Wang, Wei Ji
openaire +1 more source
Dual-comb saturated absorption spectroscopy
CLEO: 2013, 2013We proposed and demonstrated the broadband saturated absorption spectroscopy with frequency combs as pump and probe lights. Dual-comb spectroscopy was utilized to detect the Doppler-free spectroscopic signal imposed on the probe comb.
Naoya Kuse +3 more
openaire +1 more source
Modeling absorption in saturable absorbers
Optics Communications, 2001Abstract Non-linear absorption in boric acid glass films with 10−4 M concentration of fluorescein and rhodamine 6G was measured with beam intensity variation covering six orders of magnitude. The non-linear absorption in these systems has been interpreted in terms of the four-level model of saturable absorbers.
Alok Sharan +4 more
openaire +1 more source
Reverse saturable absorption in tetraphenylporphyrins
Optics Communications, 1985Abstract A decrease of the light transmission with increasing excitation intensity is observed in tetraphenylporphyrin/toluene solutions irradiated with 80 ps pulses at λ=532 nm. The experimental data are compared with simulations using a rate equation model. Excited state absorption cross-sections are evaluated.
W. Blau +3 more
openaire +1 more source
Zeeman coherence in saturated absorption
Optics Communications, 1977Abstract By modulating the saturating beam polarization, it is possible to extract from the probe beam a signal which depends only on the Zeeman coherence Δ m = 2 (transverse alignment), and to study velocity changing collisions which do not destroy the alignment.
Isabelle Colomb, Michel Dumont
openaire +1 more source
Reverse saturable absorption in metal cluster compounds
Optics Letters, 1990We report a new family of organometallic compounds that exhibit optical limiting through reverse saturable absorption. The optical limiting properties of the metal cluster compounds HFeCo(3)(CO)(12), [NEt(4)](+)FeCo(3)(CO)(12),(-) HFeCo(3)(CO)(10)(PMe(3))(2) and HFeCo(3)(CO)(10)(P(C(6)H(5))(3))(2) were measured at 532 nm using 8-nsec pulses.
L W, Tutt, S W, McCahon
openaire +2 more sources
Slow light and saturable absorption
Optics and Spectroscopy, 2009Quantitative analysis of slow light experiments utilising coherent population oscillation (CPO) in a range of saturably absorbing media, including ruby and alexandrite, Er3+:Y2SiO5, bacteriorhodopsin, semiconductor quantum devices and erbium-doped optical fibres, shows that the observations may be more simply interpreted as saturable absorption ...
openaire +1 more source